The name Isabelle is a girl's name of French origin meaning "pledged to God". Isabelle is ranked #92 on our popularity charts and is often added to lists like Fictional Princess Names and discussed in our forums with posts like "Themed Families..".
From the experts:
Isabelle and all her beautiful sisters have risen quickly through the ranks over the past decade or so to dominate their mother name, Elizabeth. Isabelle's a name about which everything is lovely, except how many other little Isabelles you'll meet.
Jeff Bridges has a grown daughter named Isabelle, while more recently Kerry Washington used it for her daughter.